Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3ae6281c3c50b2…

MALICIOUS

PDF

68.9 KB Created: 2021-01-11 23:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f54c3ee20e4484a471a88aab6f293708 SHA-1: dd51f2d58eb6a39cfa99e54a64655c8b4c5884bc SHA-256: 3d3ae6281c3c50b219b0b6a357ece8c949ed87138e8c8a115a29cbf57235fa4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests the document is designed to redirect users to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/aws?utm_term=spanning+tree+protocol+configuration+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_5fb405db69cac.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/qfigh5s/74059980125.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5fe3c35c7cf57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453900/normal_5fc59383e6ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5fbe7322196ee.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/UrSvfhc/best_photo_warp_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/igJjhdx/best_ninja_foodi_ground_beef_recipes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5ffa468aa1f5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ffa78d73a33c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5fa444278b128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5f91b5b531fde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5fcb8d78a1a78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mamibis/67687546158.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/the_broken_chain_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/magical_enchanted_vacations_login.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3D 5248 bytes
SHA-256: c0a3d633270a1a97a0e430fe4f7a28751fe2afd4599a2372e082723cff774f23
font_01_sfnt_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 12700 bytes
SHA-256: ea6234e07e1b7b094e579e187e1e334f515b710459351f521f5458e36b0a356f

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